Isabella is beautiful. Katarina, Giselli, and Rosaria are also Spanish names. Good luck
Isabella is very pretty. Some more spanish girl names could be
Arianissa
Anniya
Estrella (star in spanish)
Janiya
Rosalva
Ilianna
Arianna
Sariya
Esperenza
Lanaya
Aubrianna
Jalisa
Maribel.
Hope this helps a little bit at least :)